<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>双飞翼布局</title>
    <link rel="stylesheet" href="demo.css">
  </head>
  <body>
    <div class="container">
      <div class="main box">
        <div class="wrap">

        </div>
      </div>
      <div class="left box">

      </div>
      <div class="right box">

      </div>
    </div>
  </body>
</html>
